Photoisomerization and energy transfer in naphthalene-terminated stilbene dendrimers.

نویسندگان

  • Satoshi Nakazato
  • Tsutomu Takizawa
  • Tatsuo Arai
چکیده

Naphthalene-terminated stilbene dendrimers, the largest stilbene dendrimers to date, underwent photoisomerization via highly efficient energy transfer from the dendron group to the core stilbene. It was also demonstrated that the energy transfer efficiency in these dendrimers may be controlled by light, utilizing trans-cis isomerization as the key photoreaction.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Photoisomerization of stilbene in low viscosity solvents: Comparison of isolated and solvated molecules

Articles you may be interested in Barrier crossing and solvation dynamics in polar solvents: Photoisomerization of transstilbene and E,E diphenylbutadiene in compressed alkanols Viscosity and solvent dependence of lowbarrier processes: Photoisomerization of cisstilbene in compressed liquid solvents Unimolecular reactions in isolated and collisional systems: Deuterium isotope effect in the photo...

متن کامل

Dynamics simulations with spin-flip time-dependent density functional theory: photoisomerization and photocyclization mechanisms of cis-stilbene in ππ* states.

On-the-fly dynamics simulations were carried out using spin-flip time dependent density functional theory (SF-TDDFT) to examine the photoisomerization and photocyclization mechanisms of cis-stilbene following excitation to the ππ* state. A state tracking method was devised to follow the target state among nearly degenerate electronic states during the dynamics simulations. The steepest descent ...

متن کامل

Light-harvesting in carbonyl-terminated phenylacetylene dendrimers: The role of delocalized excited States and the scaling of light-harvesting efficiency with dendrimer size.

The photophysics of a family of conjugated phenylacetylene (PA) light-harvesting dendrimers are studied using steady-state and time-resolved optical spectroscopy. The dendrimers consist of a substituted PA core surrounded by meta-branched PA arms. The total number of PA moieties ranges from 3 (first generation) to 63 (fifth generation). By using an alcohol/ketone substituent at the dendrimer co...

متن کامل

Plcosecond Laser Studies on Photochemical Reactions in Restricted Environments: The Photoisomerization of trans-Stfibene Complexed to Cyciodextrins

The effect on picosecond reaction dynamics due to complexation of a reactive molecule with cyclodextrins was examined, with the trans-cis photoisomerization of stilbene as an example. In the presence of a-cyclodextrin, a single, slow exponential decay of trans-stilbene fluorescence is observed, consistent with the formation of a single complex. In contrast, in the presence of 8-cyclodextrin, th...

متن کامل

Photoisomerization of stilbene: a spin-flip density functional theory approach.

The photoisomerization process of 1,2-diphenylethylene (stilbene) is investigated using the spin-flip density functional theory (SFDFT), which has recently been shown to be a promising approach for locating conical intersection (CI) points (Minezawa, N.; Gordon, M. S. J. Phys. Chem. A2009, 113, 12749). The SFDFT method gives valuable insight into twisted stilbene to which the linear response ti...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology

دوره 11 6  شماره 

صفحات  -

تاریخ انتشار 2012